Method of forming sealing-rings for glass or porcelain covers.



T. L. TALIA'FERRU METHOD OF FORMING SEALING RINGS FOR GLASS OR PORCELAIN COVERS.

APPLIOATION FILED 061123. 1912.

1,089,093.. Patented may. 3, 1m

UNITED STATES PATENT OFFICE. 1

THOMAS LUCIEN IALIAFERRO, or wnnnnme, WEST VIRGINIA, Assremon, BY imsms' assremv nnrs, T rnonmx nn'amn'rrc CBHPANY, on NEW YORK, a. Y.,-- memo narronor new YGRK.

METHODDIE-FORMING?SEALING-R1863 For. Grass caroncnmn covnns.

Specification oflemrflfint- Patented Ma'1-. 3, 1914." Application filed October 23,1912. Serial madam- Methods of Forming Sealing-Rings for Glass or Porcelain Covers/of which the following is a description, reference being had to the accompanying drawing and to the figures of reference marked thereon.

The invention relates to new and-useful improvements in the method of forming a sealing ringfor a cover and more especially to the forming of a sealing ring for a porce lain or glass cover.

An object of the inven-tion is to form a.

plastic sealing ring of uniform thickness, which is deposited upon and adheres to the seating edge of the cover.

In the drawings: Figure 1 is a sectional Z IYl BW through an apparatus which may be Futilized for carrying. out my improved method; Fig. 2 shows a cover having a plastic sealingring applied thereto by my 1mpro'vejd method; Fig. 3 shows the cover applied to a receptacle for closing the same.

' My improved method consists generally in the constructing of a sealing ring for a glass or. porcelain cover from a plastic seal ing material, which is built up of layers of plastic sealing material deposited directly I :upon the cover until a ring of uniform thickness is p 'oduced. I While there are many ways by which my method may be carried out, T-have illus trated in Fig: 1 of the drawing, one form I "of apparatus which maybe utilized for this.

Purpose, and the S p of 'themethod Wm 40 be made. clear by a description of this apparatus.

The apparatus'consists of a receptacle 1, in whichv a plastic sealing material 2 is placed. This plastic sealing materialprefi erably includes a volatile solvent, whereby the plastic sealing material, when applied to the coyer, will, through evaporation become one solid plastic mass. It'1s obv ous,

however, that other solvents maybe utilised in connection with m sealing material. Y .Mounted to rotate in the receptacle 1, is a coating roll 3, which is so positioned that the lower surface thereof rotates in the plastiofsealing material. Cotiperatingwith the roll 3 is an evener or scraper 4, which re moves the surplus sealing material from the coating roll so that a uniform layer of seallng material is carried along on the coating roll. Mounted on the receptacle 1 is a retatingchuck 5, having a. flange 6'thereon, forming a seat for the cover 7. The cover 7 is preferably made of glass or porcelain and is provided with an annular rib 8 on lts under face, forming an annular groove or seat 9, extending tothe edge of the cover. This groove or seat 9 is adapted to receive the p asticsealing material, which is met cated at 10, in Figs. 2 and-3. The cover 7.

is placed on the can body ,11, so that the The coating' roll 3' moves in the. direction i of the arrow in Fig. 1, and the cover is held by the chuck, so that the lower edge thereof, 18 practically in contact with the roll.

material will be scraped oil on to the an" nular seat 9 of the cover. Inasmuch as the chuck 5 is rotat ng, the sealing material will the coating roll turns, therefore, the sealing I be deposited in spiral layers on the cover.

l The thickness of these layers will depend upon the thickness of the coating; on thecoating roll, and the speed of travel of. the' chuck, relative to the travel of'the coating 1 roll. The thickness of the plastic ring built up of t hese spiral layers will depend upon' the thlckness of the layers and the time that said cover is rotated in contact with the coating rolL acter, and will, therefore, stick to the coating roll. As a consequence, said coating material, as it is scraped from the roll, will be pressed or packed against the seat. While ter of fact, the plastic sealing material'is so packed or pressed against the seat on the The sealing material is adhesive .in charcover, and the layers applied thereto, that said r ng becomes. one solid mass or plastic material. v a a V I am aware that prior to my invention, has been. a "common praptiee to coat metallic covers by rotating meeting rollin contact with the surface to be coated. -1This r'oll,; l is so P itioned. at the cover."

moves in a'pla-ne Substantially parallel with the axis of the roll, and the amount of the coating material applied to the cover depends upon the adhesive strength of the coating material. -By "my present method, however, the coating material is positively deposited on the part of the cover to be.

coated by the scraping of the material thereon. Furthermore, by this method, the mater'ial may be placed on the coyer in relatively thick layers, so that a sealing ring of substantial thickness may be built up as distingl ished from a mere thin coating layer, which is all that jcan be applied'by the old form of coating method. 1 am also aware that, it ris old in the art to coat covers with a" plastic material delivered thereto trom a I nozzle. In order, to apply such a coating,

thesealing material must be in liquid form andlcould not bebuilt up in layers on the edge of a cover, such as shown and described above, Furthermore, where the coating material is'appliedto the cover in liquid form,

the; capillary-attraction of the vertical flange on the usual type of cover would not permit ring of suflicient thickness to he formed. Then again, when the sealing material'is placed on the cover in liquid form,

air bubbles or pockets often. form between the. glass and the lining solution, which, of

course, are objectionable as they prevent the formingofaa proper seal.

5 By ,myximproyed plastic sealing ring, the

plastic material may be shaped to the upper edge of the body. of the receptacle to which theZcover-is applied, and, as a matter of fact,

when this rover} isipressed {on to itheibody by the clampingband, this sealing materialwill be forced down over the outer edge of the top of the reccptacle and practically fills all inner and outer edges is necessarily of the same thickness, but, rather, that various cross sectional areas of the ring throughout the entire circumference thereof are substantially the same.

Having thus described my invention,what I claim is 2-- 1. The method of forming a sealing ring on a cover, consisting in scraping the plastic sealing material on to the edge of the cover to be coated in spirally made layers of substantially uniform thickness.

2. The method of forming a plastic sealing ring on a cover, consisting in layingon the edge of the cover to be coated plastic sealing material by scraping the same there; 7

on in spirally made layers, whereby a plastic coating of uniform thickness is formed.

In testimony whereof, I affix my signature, in the presence of two w1tnesses.

moms LUeIEN TALIAFERRO.

Witnesses .ALLAN KELLY, A. L. METZNER. 

